Rate of Geothermal Temperature change along True Vertical Direction:
{\rm Grad} T_{GN}({\bf r}) = \frac{\partial T_{GN}}{\partial z} |
It can be estimated as ratio of true vertical component of regional Earth's Heat Flux to the subsurface Thermal Conductivity
at a certain subsurface point
:
{\rm Grad} T_{GN}({\bf r}) = \frac{j_z({\bf r})}{\lambda_e({\bf r})} |
| Fig. 1. Schematic view of the Earth's Geothermal Temperature Gradient. |
The most common value of Unbiased Geothermal Temperature Gradient (GT) away from tectonic plate boundaries is: .
Geology / Geothermal Temperature Field
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